SIN start with number 1 for people in Ontario

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SIN start with number 1 for people in Ontario
1xx Series SIN (Atlantic and Ontario region)

Social Insurance Number applicants in Ontario might have noticed their SIN starts with the number 1 series, which is the same as for people living in the Atlantic region. Social Insurance office started to roll out SIN with 1 series for people who applied for their SIN in the Ontario region in the fall of 2021. This move seems to be because the 4 and 5 series SIN has reached its limit.

SIN start with number 1 for people in Ontario

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